#!/bin/sh
# Copyright (c) 2015-2016 Oracle and/or its affiliates. All Rights Reserved.
# Copyright (c) International Business Machines  Corp., 2005
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 2 of
# the License, or (at your option) any later version.
#
# This program is distributed in the hope that it would be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# Author: Mitsuru Chinen <mitch@jp.ibm.com>

TST_TOTAL=1
TCID=if4-addr-change
TST_CLEANUP="do_cleanup"

CHECK_INTERVAL=${CHECK_INTERVAL:-$(($NS_TIMES / 20))}
# Maximum host portion of the IPv4 address on the local host
LHOST_IPV4_HOST_MAX="254"

. test_net.sh

do_cleanup()
{
	tst_restore_ipaddr
	tst_wait_ipv6_dad
}

trap "tst_brkm TBROK 'test interrupted'" INT

tst_check_cmds ifconfig

tst_resm TINFO "ifconfig changes IPv4 address $NS_TIMES times"

cnt=0
num=1
while [ $cnt -lt $NS_TIMES ]; do
	# Define the network portion
	num=$(($num + 1))
	[ $num -gt $LHOST_IPV4_HOST_MAX ] && num=1

	[ $num -eq $RHOST_IPV4_HOST ] && continue

	# check prefix and fix values for prefix != 24
	add_to_net=
	if [ $IPV4_LPREFIX -lt 8 -o $IPV4_LPREFIX -ge 32 ] ; then
		tst_brkm TCONF "test must be with prefix >= 8 and prefix < 32 ($IPV4_LPREFIX)"
	elif [ $IPV4_LPREFIX -lt 16 ]; then # N.x.x.num
		add_to_net=".0.1"
	elif [ $IPV4_LPREFIX -lt 24 ]; then # N.N.x.num
		add_to_net=".1"
	fi

	# Change IPv4 address
	ROD ifconfig $(tst_iface) ${IPV4_LNETWORK}${add_to_net}.${num} netmask \
		$IPV4_LNETMASK broadcast $IPV4_LBROADCAST

	cnt=$(($cnt + 1))

	[ $CHECK_INTERVAL -eq 0 ] && continue
	[ $(($cnt % $CHECK_INTERVAL)) -ne 0 ] && continue

	tst_resm TINFO "ping $(tst_ipaddr):$(tst_ipaddr rhost) ${cnt}/$NS_TIMES"
	tst_ping
done

tst_ping

tst_exit
